Karl Andrzejewski holds a plastic bag filled with marijuana vapor at his home in Kalamazoo, Mich., while his attorney John Targowski looks on. Andrzejewski, 42, was diagnosed with pancreatic cancer and is a registered medical marijuana patient and caregiver.

Karl Andrzejewski holds a plastic bag filled with marijuana vapor at his home in Kalamazoo, Mich., while his attorney John Targowski looks on. Andrzejewski, 42, was diagnosed with pancreatic cancer and is a registered medical marijuana patient and caregiver.